What are the cultural factors that create boundaries within Eastern Europe? Select all that apply

There’s no picture or character?

It's between the sagittarius and perseus arms of the milky way.

Imma just take a guess and a lunar eclipse.

Answer is b)eutrophication occurs when excess nutrients are present in aquatic ecosystems, resulting in the increased production of plant life and the subsequent decrease in the oxygen levels of the watereutrophication occurs when there are excess nutrients in a body of water. this results in plants having more food and reproducing  more, sometimes leading to more aquatic animal life as well. ultimately, this can reduce the oxygen level in the ecosystem.